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Ohio-d research Fifa 14 Ultimate Team Coins and development company Battellehas filed a patent for a device that shoots outrings of gas. Such a system could help riot poce dever a targeted dose of tear gas to particularindividuals, or firefighters to clear rooms filled with smoke.

Vortex guns have been around for years as toys and the US armyhas been investigating their use for non-lethalcrowd control, but Battelle's industrial version could have arange of commercial s. The gun creates vortex rings byforcing gas at high velocity down the gun's cynder. The ringforms when the friction of the cynder wall causes a thin layer ofgas to roll forward on itself ke a donut. The ring revolves onitself while travelng down and out of the barrel -- a ttle kea tornado formed into a ring shape. As the ring leaves the chamber,the Battelle gun gives it a ght electrical charge.